Abstract
Multiple theories of the cause and treatment of aphthous ulcers are described in the medical and dental literature. A case is reported in which there were posttreatment sequelae from the application of a silver-nitrate stick (pencil) to an aphthous ulcer on the tongue. Complications subsequent to the use of silver nitrate may contraindicate the use of this agent in its highly concentrated form on the mucous membranes of the mouth.